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Exploring the cantilever: Teaching tools for atomic force microscopy
European Journal of Physics ( IF 0.7 ) Pub Date : 2020-06-16 , DOI: 10.1088/1361-6404/ab92d4
Merrell A Johnson

We are presenting a series of experiments to help aid with understanding some of the fundamental concepts pertaining the resonance of cantilevers. The goal is to provide an accessible platform for exploring and understanding the principles behind non-contact scanning probe/atomic force microscopy. We highlight a simple experiment that utilizes a piezo buzzer and oscilloscope to measure the natural resonance frequency of a cantilever. This information is used to show how the frequency is related to the length and to extract information about the Young's Modulus of the material. We also present how one is able to utilize a piezo driven craft stick to measure masses within a 100th of a gram. Utilizing the same driven craft sticks we present a series of experiments that employ the use of a magnetic probe to explore the differences between attractive and repulsive forces. In addition, a discussion of how the results relate to the tip-sample interactions in atomic force microscopy will be displayed. The experiments presented were developed as part of an undergraduate modern physics laboratory and a scanning probe microscopy course. A review of how these experiments were implemented in the courses will be exhibited.

中文翻译:

探索悬臂:原子力显微镜教学工具

我们正在展示一系列实验,以帮助理解与悬臂共振有关的一些基本概念。目标是提供一个可访问的平台,用于探索和理解非接触式扫描探针/原子力显微镜背后的原理。我们重点介绍了一个简单的实验,该实验利用压电蜂鸣器和示波器来测量悬臂梁的自然共振频率。此信息用于显示频率与长度的关系并提取有关材料杨氏模量的信息。我们还介绍了如何利用压电驱动的工艺棒来测量 100 克以内的质量。利用相同的驱动工艺棒,我们提出了一系列实验,这些实验使用磁探针来探索吸引力和排斥力之间的差异。此外,还将讨论结果如何与原子力显微镜中的尖端-样品相互作用相关。所展示的实验是作为本科现代物理实验室和扫描探针显微镜课程的一部分开发的。将展示如何在课程中实施这些实验的回顾。
更新日期:2020-06-16
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